"I am not trying to unseat John Barton but we do want to send a public message to focus investor attention on the fleet plan presented by the management twice yearly alongside the results presentation. Unfortunately very few investors seem to pay much attention to it," Haji-Ioannou said.

"In our view the best way to increase the earnings per share and send the share price up again is to reduce the incremental aircraft in the fleet from 2018 onwards. As patient long-term investors in this company we will be watching the new fleet plan with anticipation."

Haji-Ioannou quit the EasyJet board in 2010 in an effort to make the management abort expansion plans. He has long voiced the opinion the airline should focus "more on shareholder value and less on top line growth" to free up cash for dividend payments.

In 2013, he said he was becoming "increasingly concerned" about the airline's expansion plans, saying he had sold 200,000 shares in protest against plans to buy more planes.